WO2020124799A1 - 柔性 oled 显示面板以及显示装置 - Google Patents

柔性 oled 显示面板以及显示装置 Download PDF

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Publication number
WO2020124799A1
WO2020124799A1 PCT/CN2019/077209 CN2019077209W WO2020124799A1 WO 2020124799 A1 WO2020124799 A1 WO 2020124799A1 CN 2019077209 W CN2019077209 W CN 2019077209W WO 2020124799 A1 WO2020124799 A1 WO 2020124799A1
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Prior art keywords
layer
insulating layer
thin film
film transistor
drain
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PCT/CN2019/077209
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English (en)
French (fr)
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邬可荣
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武汉华星光电半导体显示技术有限公司
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Priority to US16/337,100 priority Critical patent/US20210367169A1/en
Publication of WO2020124799A1 publication Critical patent/WO2020124799A1/zh

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10Substrates, e.g. flexible substrates
    • H10K77/111Flexible substrates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1251Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs comprising TFTs having a different architecture, e.g. top- and bottom gate TFTs
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1218Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/121Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/124Insulating layers formed between TFT elements and OLED elements
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/125Active-matrix OLED [AMOLED] displays including organic TFTs [OTFT]
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301Details of OLEDs
    • H10K2102/311Flexible OLED
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/549Organic PV cells

Definitions

  • the present application relates to the field of display technology, in particular to a flexible OLED display panel and display device.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • OLED Organic Light-Emitting Diode
  • thin film transistors with better bending performance are generally used.
  • thin film transistors with better bending performance are relatively low, resulting in insufficient gate drive current.
  • the technical problem mainly solved by the present application is how to improve the bending resistance of the bending area and ensure that there is sufficient gate drive current in the non-bending area.
  • the present application provides a flexible OLED display panel, including:
  • a flexible substrate the flexible substrate includes a non-bending area and a bending area
  • a first thin film transistor is provided on the non-bending area, and a second thin film transistor is provided on the bending area;
  • the first thin film transistor is a low temperature polysilicon transistor
  • the second thin film transistor is an organic thin film transistor
  • the first thin film transistor includes:
  • a polysilicon layer, the polysilicon layer is provided on the flexible substrate;
  • a third thin film transistor is further provided on the non-bending area and the bending area, and the third thin film transistor is an organic thin film transistor.
  • the second thin film transistor includes:
  • the active layer of the first thin film transistor and the active layer of the second thin film transistor are provided in different layers.
  • the driving transistor includes:
  • the flexible OLED display panel provided by the present application further includes an organic flat layer, an anode, a pixel definition layer and a gap pillar stacked on the third source and the third drain, the organic flat layer covering the A third source and the third drain.
  • the second thin film transistor includes:
  • the first gate layer and the second gate layer are provided in different layers.
  • the present application provides a flexible OLED display panel, including:
  • a flexible substrate the flexible substrate includes a non-bending area and a bending area
  • a first thin film transistor is provided on the non-bending area, and a second thin film transistor is provided on the bending area;
  • the first thin film transistor is a low temperature polysilicon transistor
  • the second thin film transistor is an organic thin film transistor
  • the first thin film transistor includes:
  • a polysilicon layer, the polysilicon layer is provided on the flexible substrate;
  • the second thin film transistor includes:
  • the active layer of the first thin film transistor and the active layer of the second thin film transistor are provided in different layers.
  • a third thin film transistor is further provided on the non-bending area and the bending area, and the third thin film transistor is an organic thin film transistor.
  • the driving transistor includes:
  • the flexible OLED display panel provided by the present application further includes an organic flat layer, an anode, a pixel definition layer and a gap pillar stacked on the third source and the third drain, the organic flat layer covering the A third source and the third drain.
  • the second thin film transistor includes:
  • the first gate layer and the second gate layer are provided in different layers.
  • the present application also provides a display device including a flexible OLED display panel
  • the flexible OLED display panel includes:
  • a flexible substrate the flexible substrate includes a non-bending area and a bending area
  • a first thin film transistor is provided on the non-bending area, and a second thin film transistor is provided on the bending area;
  • the first thin film transistor is a low temperature polysilicon transistor
  • the second thin film transistor is an organic thin film transistor
  • the first thin film transistor includes:
  • a polysilicon layer, the polysilicon layer is provided on the flexible substrate;
  • the second thin film transistor includes:
  • the second thin film transistor includes:
  • the beneficial effect of the present application is that it can improve the bending resistance of the bending area and ensure that there is sufficient gate drive current in the non-bending area.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a flexible OLED display panel provided by this application;
  • FIG. 2 is a schematic flow chart of manufacturing a first thin film transistor and a third thin film transistor on a non-bending area in this application;
  • FIG. 3 is a schematic flow chart of manufacturing a second thin film transistor and a third thin film transistor on a bending area in this application;
  • FIG. 4 is a schematic structural diagram of a second embodiment of a flexible OLED display panel provided by this application.
  • FIG. 1 is a schematic cross-sectional view of a flexible OLED display panel provided by this application.
  • the present application provides a flexible OLED display panel 1, which includes a flexible substrate 10, and the flexible substrate includes a non-bending area 101 and a bending area 102.
  • the buffer layer 21 is provided on the flexible substrate 10.
  • a first thin film transistor 201 is provided on the non-bending area 101, and a second thin film transistor 202 is provided on the bending area 102.
  • the first thin film transistor 201 is a low temperature polysilicon transistor
  • the second thin film transistor 202 is an organic thin film transistor.
  • the material of the flexible substrate 10 may be polyimide, and the flexible substrate 10 includes a non-bent region 101 and a bent region 102.
  • a first thin film transistor 201 is provided on the non-bending area 101, and the first thin film transistor 201 is a low temperature polysilicon transistor.
  • a second thin film transistor 202 is provided on the bending region 102, and the second thin film transistor 202 is an organic thin film transistor.
  • a first thin film transistor 201 is provided on the non-bent region 101, and the first thin film transistor 201 is used as a switching transistor in the non-bent region 01. The characteristics can ensure that the non-bent region 101 has sufficient gate drive current.
  • a second thin film transistor 202 is provided on the bending region 102, and the second thin film transistor 202 is used as a switching transistor in the bending region 102, and the second thin film transistor 202 has high flexibility to make the bending region 102 It is not easy to be broken during bending, therefore, the bending resistance of the bending area 102 is improved.
  • the first thin film transistor 201 may include: a polysilicon layer 301 disposed on the flexible substrate 10; a first insulating layer 401, a first gate layer 501, a second insulating layer 402 and a first insulating layer stacked on the polysilicon layer 301 Three insulating layer 403.
  • the first via hole and the second via hole, the first via hole 601 and the second via hole 602 both penetrate the first insulating layer 401, the first gate layer 501, the second insulating layer 402, and the third insulating layer 403, and the first A via 601 and a second via 602 are respectively disposed on one side of the polysilicon layer 301.
  • the first source 601 is provided in the first via
  • the first drain 602 is provided in the second via.
  • the first source 601 and the first drain 602 cover at least a portion of the third insulating layer 403.
  • the first thin film transistor 201 uses an inorganic thin film transistor, which can improve electron mobility and ensure sufficient gate drive current.
  • the first gate layer 501 and the polysilicon layer 301 form a capacitor.
  • the second thin film transistor 202 may include: a stacked fourth insulating layer 404, a fifth insulating layer 405, a second gate layer 502, a sixth insulating layer 406, and a first organic semiconductor layer 302.
  • the sixth insulating layer 406 covers the second gate layer 302 and the fifth insulating layer 405, and a second source 603 and a second drain 604, a second source 603 and a second
  • the two drain electrodes 604 are electrically connected through the first organic semiconductor layer 302.
  • the second thin film transistor 202 adopts a bottom gate structure.
  • the second thin film transistor 202 adopts an organic thin film transistor to ensure that the flexible OLED display panel has good bendability, so that the flexible OLED display panel is not easily broken when bent, thereby improving the product yield of the flexible OLED display panel.
  • a third thin film transistor 203 is further provided on the non-bent region 101 and the bent region 102, and the third thin film transistor 203 is an organic thin film transistor.
  • the third thin film transistor 203 may include: a stacked seventh insulating layer 407, a third gate layer 503, an eighth insulating layer 408, a fourth gate layer 504, a ninth insulating layer 409, and a second organic semiconductor layer 303;
  • the third source electrode 605 and the third drain electrode 606 are oppositely disposed on the second organic semiconductor layer 303.
  • the third source electrode 605 and the third drain electrode 606 are electrically connected through the second organic semiconductor layer 303.
  • FIG. 2 is a schematic flow chart of manufacturing a first thin film transistor and a third thin film transistor on a non-bending area in this application.
  • a buffer layer 21 is formed on the non-bent area 101 on the flexible substrate 10. Then, a first insulating layer is formed on the buffer layer 21. Subsequently, a polysilicon layer 301 in the first thin film transistor 201 and a third gate layer 503 in the third thin film transistor 203 are formed on the first insulating layer. Then, a second insulating layer is formed on the polysilicon layer 301 and the third gate layer 503. The second insulating layer is disposed on the polysilicon layer 301 and the third gate layer 503 and covers the first insulating layer. Next, a fourth gate layer 504, a third insulating layer, and an organic semiconductor layer are sequentially formed on the second insulating layer.
  • the organic semiconductor layer is etched to form the second organic semiconductor layer 303 of the third thin film transistor 203. Then, the source 601 and the drain 602 of the first thin film transistor 201 are fabricated.
  • the second thin film transistor 202 and the second thin film transistor 203 can be manufactured together.
  • FIG. 3 is a process of manufacturing the second thin film transistor and the third thin film transistor on the non-bending area in this application Schematic.
  • a buffer layer 21 is formed on the bending region 102 on the flexible substrate 10. Then, a first insulating layer is formed on the buffer layer 21. Subsequently, the third gate layer 503 in the third thin film transistor 203 is formed on the first insulating layer. Then, a second insulating layer is formed on the third gate layer 503. The second insulating layer is disposed on the third gate layer 503 and covers the first insulating layer. Next, a second gate layer 502 in the second thin film transistor 202 and a fourth gate layer 504 in the third thin film transistor 203 are formed on the second insulating layer. Then, a third insulating layer and an organic semiconductor layer are sequentially formed on the second gate layer 502 and the fourth gate layer 504.
  • the organic semiconductor layer is etched to form the first organic semiconductor layer 302 of the second thin film transistor 202 and the second organic semiconductor layer 303 of the third thin film transistor 203.
  • it further includes an organic flat layer 71, an anode 72, a pixel definition layer 73, a gap pillar 74, an organic light emitting layer 75, and a cathode 76 package disposed on the third source 605 and the third drain 606
  • the layer 77, the polarizing layer 78 and the touch layer 79, and the organic flat layer 71 cover the third source electrode 605 and the third drain electrode 606. It should be noted that, in this embodiment, the third drain 606 of the driving TFT is electrically connected to the anode 72.
  • the first gate layer 501 and the third gate layer 503 are provided in the same layer.
  • FIG. 4 is a schematic structural diagram of a second embodiment of a flexible OLED display panel provided by this application.
  • the difference between the flexible OLED display panel 1 of FIG. 4 and the flexible OLED display panel of FIG. 1 is that the buffer layer 21 and the fourth insulating layer 404 of the bending region 102 have been etched away during the manufacturing process.
  • the second thin film transistor 202 may include:
  • the difference between this embodiment and the previous embodiment is that the fourth insulating layer 404 is etched away by etching, which further improves the bending ability of the bending region 102.
  • the structure of the driving transistor 203 is similar to that of the previous embodiment, and will not be repeated here.
  • the first gate layer 501 and the second gate layer 502 are provided in different layers.
  • the present application also provides a display device, including a flexible OLED display panel 1.
  • a display device including a flexible OLED display panel 1.
  • the structure of the flexible OLED display panel please refer to the previous embodiments, and no more details are provided here.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
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Abstract

本申请提供的柔性OLED显示面板以及显示装置,柔性OLED显示面板包括:柔性基板,柔性基板包括非弯折区和弯折区;在非弯折区上设置有第一薄膜晶体管,以及在弯折区上设置有第二薄膜晶体管;其中,第一薄膜晶体管为低温多晶硅晶体管,第二薄膜晶体管为有机薄膜晶体管。

Description

柔性OLED显示面板以及显示装置 技术领域
本申请涉及显示技术领域,具体涉及一种柔性OLED显示面板以及显示装置。
背景技术
随着显示技术的发展,新一代显示技术的开发与应用化逐渐被应用到多个领域,例如,可穿戴设备如智能手环、智能手表、虚拟现实(Virtual Reality,VR)设备以及移动电话机等。
相较于传统的薄膜晶体管液晶显示器(Thin Film Transistor-Liquid Crystal Display,TFT-LCD)而言,有机发光二极管(Organic Light-Emitting Diode, OLED)最大的优势在于其可做成可折叠的产品。由于TFT部分含有很多易脆的膜层,柔性折叠产品在反复折叠过程中出现容易出现结构或性能失效,甚至断裂。
因此,在可折叠的OLED中,一般会使用弯折性能较好的薄膜晶体管。然而,相对于无机薄膜晶体管而言,弯折性能较好的薄膜晶体管相对较低,导致无法提供足够的栅极驱动电流。
技术问题
本申请主要解决的技术问题,如何能够提高弯折区的抗弯折能力,并且保证非弯折区有足够的栅极驱动电流。
技术解决方案
第一方面,本申请提供了一种柔性OLED显示面板,包括:
柔性基板,所述柔性基板包括非弯折区和弯折区;
在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管;
所述第一薄膜晶体管包括:
多晶硅层,所述多晶硅层设置在所述柔性基板上;
层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有第一源级,以及在所述第二过孔设置有第一漏极,所述第一源极以及第一漏极至少覆盖部分所述第二绝缘层;
在所述非弯折区和所述弯折区上还设置有第三薄膜晶体管,且所述第三薄膜晶体管为有机薄膜晶体管。
在本申请提供的柔性OLED显示面板中,所述第二薄膜晶体管包括:
层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
在本申请提供的柔性OLED显示面板中,所述第一薄膜晶体管的有源层与所述第二薄膜晶体管的有源层为不同层设置。
在本申请提供的柔性OLED显示面板中,所述驱动晶体管包括:
层叠设置的第七绝缘层、第三栅极层、第八绝缘层、第四栅极层、第九绝缘层以及第二有机半导体层;其中,在所述第二有机半导体层上相对设置有第三源极以及第三漏极,所述第三源极以及所述第三漏极通过所述第二有机半导体层电性连接。
在本申请提供的柔性OLED显示面板中,还包括层叠设置在所述第三源极和第三漏极上的有机平坦层、阳极、像素定义层以及间隙柱,所述有机平坦层覆盖所述第三源极和所述第三漏极。
在本申请提供的柔性OLED显示面板中,所述第二薄膜晶体管包括:
层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第一有机半导体层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
在本申请提供的柔性OLED显示面板中,所述第一栅极层与所述第二栅极层为不同层设置。
第二方面,本申请提供了一种柔性OLED显示面板,包括:
柔性基板,所述柔性基板包括非弯折区和弯折区;
在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管。
在本申请提供的柔性OLED显示面板中,所述第一薄膜晶体管包括:
多晶硅层,所述多晶硅层设置在所述柔性基板上;
层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有源级,以及在所述第二过孔设置有漏极,所述源极以及漏极至少覆盖部分所述第二绝缘层。
在本申请提供的柔性OLED显示面板中,所述第二薄膜晶体管包括:
层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
在本申请提供的柔性OLED显示面板中,所述第一薄膜晶体管的有源层与所述第二薄膜晶体管的有源层为不同层设置。
在本申请提供的柔性OLED显示面板中,在所述非弯折区和所述弯折区上还设置有第三薄膜晶体管,且所述第三薄膜晶体管为有机薄膜晶体管。
在本申请提供的柔性OLED显示面板中,所述驱动晶体管包括:
层叠设置的第七绝缘层、第三栅极层、第八绝缘层、第四栅极层、第九绝缘层以及第二有机半导体层;其中,在所述第二有机半导体层上相对设置有第三源极以及第三漏极,所述第三源极以及所述第三漏极通过所述第二有机半导体层电性连接。
在本申请提供的柔性OLED显示面板中,还包括层叠设置在所述第三源极和第三漏极上的有机平坦层、阳极、像素定义层以及间隙柱,所述有机平坦层覆盖所述第三源极和所述第三漏极。
在本申请提供的柔性OLED显示面板中,所述第二薄膜晶体管包括:
层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第一有机半导体层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
在本申请提供的柔性OLED显示面板中,所述第一栅极层与所述第二栅极层为不同层设置。
第三方面,本申请还提供了一种显示装置,包括柔性OLED显示面板;
所述柔性OLED显示面板包括:
柔性基板,所述柔性基板包括非弯折区和弯折区;
在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管。
在本申请提供的显示装置中,所述第一薄膜晶体管包括:
多晶硅层,所述多晶硅层设置在所述柔性基板上;
层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有第一源级,以及在所述第二过孔设置有第一漏极,所述第一源极以及第一漏极至少覆盖部分所述第二绝缘层。
在本申请提供的显示装置中,所述第二薄膜晶体管包括:
层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
在本申请提供的显示装置中,所述第二薄膜晶体管包括:
层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
有益效果
本申请的有益效果是:能够提高弯折区的抗弯折能力,并且保证非弯折区有足够的栅极驱动电流。
附图说明
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请所提供的柔性OLED显示面板的第一种实施方式的结构示意图;
图2为本申请中在非弯折区上制作第一薄膜晶体管和第三薄膜晶体管的流程示意图;
图3为本申请中在弯折区上制作第二薄膜晶体管和第三薄膜晶体管的流程示意图;
图4为本申请所提供的柔性OLED显示面板的第二种实施方式的结构示意图。
本发明的实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
请参阅图1,图1为本申请所提供的柔性OLED显示面板的截面示意图。
本申请提供一种柔性OLED显示面板1,包括:柔性基板10,柔性基板包括非弯折区101和弯折区102。缓冲层21,缓冲层21设置在柔性基板10上。在非弯折区101上设置有第一薄膜晶体管201,以及在弯折区102上设置有第二薄膜晶体管202。其中,第一薄膜晶体管201为低温多晶硅晶体管,第二薄膜晶体管202为有机薄膜晶体管。
例如,柔性基板10的材料可以是聚酰亚胺,该柔性基板10包括包括非弯折区101和弯折区102。其中,在非弯折区101上设置有第一薄膜晶体管201,该第一薄膜晶体管201为低温多晶硅晶体管。以及在弯折区102上设置有第二薄膜晶体管202,该第二薄膜晶体管202为有机薄膜晶体管。在非弯折区101上设置第一薄膜晶体管201,并将该第一薄膜晶体管201作为非弯折区01的开关晶体管使用,利用第一薄膜晶体管201具有高迁移率和低亚阈值摆幅的特性,可以保证非弯折区101有足够的栅极驱动电流。同时,在弯折区102上设置第二薄膜晶体管202,并将该第二薄膜晶体管202作为弯折区102的开关晶体管使用,利用第二薄膜晶体管202柔韧性高的特性,使得弯折区102在弯折时不易被折断,因此,提高了弯折区102的抗弯折能力。
请继续参阅图1。第一薄膜晶体管201可以包括:多晶硅层301,多晶硅层301设置在柔性基板10上;层叠设置在多晶硅层301上的第一绝缘层401、第一栅极层501、第二绝缘层402以及第三绝缘层403。
第一过孔和第二过孔,第一过孔601和第二过孔602均贯穿第一绝缘层401、第一栅极层501、第二绝缘层402以及第三绝缘层403,且第一过孔601和第二过孔602分别设置在多晶硅层301的一侧。其中,在第一过孔中设置有第一源级601,以及在第二过孔设置有第一漏极602,第一源极601以及第一漏极602至少覆盖部分第三绝缘层403。此外,第一薄膜晶体管201采用无机薄膜晶体管,能够提高电子迁移率,保证足够的栅极驱动电流,第一栅极层501与多晶硅层301组成电容。
第二薄膜晶体管202可以包括:层叠设置的第四绝缘层404、第五绝缘层405、第二栅极层502、第六绝缘层406以及第一有机半导体层302。第六绝缘层406覆盖第二栅极层302以及第五绝缘层405,在第二多晶硅层302上相对设置有第二源级603以及第二漏极604,第二源级603以及第二漏极604通过第一有机半导体层302电性连接。
其中,该第二薄膜晶体管202采用底栅结构。并且,该第二薄膜晶体管202采用有机薄膜晶体管能够保证柔性OLED显示面板具有良好的弯折性,使得柔性OLED显示面板在弯折时不易被折断,从而提高了柔性OLED显示面板的产品良率。
在非弯折区101和弯折区102上还设置有第三薄膜晶体管203,且第三薄膜晶体管 203为有机薄膜晶体管。
第三薄膜晶体管203可以包括:层叠设置的第七绝缘层407、第三栅极层503、第八绝缘层408、第四栅极层504、第九绝缘层409以及第二有机半导体层303;其中,在第二有机半导体层303上相对设置有第三源极605以及第三漏极606,第三源极605以及第三漏极606通过第二有机半导体层303电性连接。
在制程上,第一薄膜晶体管201和第二薄膜晶体管203可以一并制作。请参阅图2,图2为本申请中在非弯折区上制作第一薄膜晶体管和第三薄膜晶体管的流程示意图。
首先,在柔性基板10上的非弯折区101上形成一层缓冲层21。然后,在缓冲层21上形成第一层绝缘层。随后,在第一层绝缘层上形成第一薄膜晶体管201中的多晶硅层301和第三薄膜晶体管203中的第三栅极层503。然后,在多晶硅层301和第三栅极层503上形成第二层绝缘层。该第二层绝缘层设置在多晶硅层301和第三栅极层503上并覆盖第一层绝缘层。接着,在第二层绝缘层上依次形成第四栅极层504、第三层绝缘层以及一层有机半导体层。
需要说明的是,在形成该有机层半导体层后,对该有机半导体层进行蚀刻,以形成第三薄膜晶体管203的第二有机半导体层303。然后,再进行制作第一薄膜晶体管201的源极601和漏极602。
另外,在制程上,第二薄膜晶体管202和第二薄膜晶体管203可以一并制作请参阅图3,图3为本申请中在非弯折区上制作第二薄膜晶体管和第三薄膜晶体管的流程示意图。
首先,在柔性基板10上的弯折区102上形成一层缓冲层21。然后,在缓冲层21上形成第一层绝缘层。随后,在第一层绝缘层上形成第三薄膜晶体管203中的第三栅极层503。然后,在第三栅极层503上形成第二层绝缘层。该第二层绝缘层设置在第三栅极层503上并覆盖第一层绝缘层。接着,在第二层绝缘层上形成第二薄膜晶体管202中的第二栅极层502以及第三薄膜晶体管203中的第四栅极层504。然后在第二栅极层502和第四栅极层504上依次形成第三层绝缘层以及一层有机半导体层。
需要说明的是,在形成该有机层半导体层后,对该有机半导体层进行蚀刻,以形成第二薄膜晶体管202的第一有机半导体层302和第三薄膜晶体管203的第二有机半导体层303。
在一些实施例中,还包括设置在所述第三源极605和第三漏极606上的有机平坦层71、阳极72、像素定义层73、间隙柱74、有机发光层75、阴极76封装层77、偏光层78以及触控层79,有机平坦层71覆盖所述第三源极605和所述第三漏极606。需要说明的是,在本实施例中,驱动TFT的漏极即第三漏极606与阳极72电性连接。
第一栅极层501与第三栅极层503同层设置。
请参阅图4,图4为本申请所提供的柔性OLED显示面板的第二种实施方式的结构示意图。图4的柔性OLED显示面板1与图1的柔性OLED显示面板的区别在于:弯折区102的缓冲层21以及第四绝缘层404在制作过程中已被刻蚀掉。即,第二薄膜晶体管202可以包括:
层叠设置的第五绝缘层405、第二栅极层502、第六绝缘层406以及第一有机半导体层302;其中,第六绝缘层406覆盖第二栅极层502以及第五绝缘层405,在第一有机半导体层502上相对设置有第二源级603以及第二漏极604,第二源级603以及第二漏极604通过第一有机半导体层302电性连接。
需要说明的是,本实施例与前面实施例不同的是,采用刻蚀的方式将第四绝缘层404刻蚀掉,进一步提高了弯折区102的弯折能力。此外,驱动晶体管203的结构与前面实施例的类似,在此不再赘述。
在一些实施方式中,第一栅极层501与第二栅极层502为不同层设置。
相应的,本申请还提供一种显示装置,包括柔性OLED显示面板1,柔性OLED显示面板的结构请参阅前面实施例,在此不再赘述。
以上对本申请提供的柔性OLED显示面板以及显示装置进行了详细介绍,本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请。同时,对于本领域的技术人员,依据本申请的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种柔性OLED显示面板,其包括:
    柔性基板,所述柔性基板包括非弯折区和弯折区;
    在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
    其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管;
    所述第一薄膜晶体管包括:
    多晶硅层,所述多晶硅层设置在所述柔性基板上;
    层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
    第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有第一源级,以及在所述第二过孔设置有第一漏极,所述第一源极以及第一漏极至少覆盖部分所述第二绝缘层;
    在所述非弯折区和所述弯折区上还设置有第三薄膜晶体管,且所述第三薄膜晶体管为有机薄膜晶体管。
  2. 根据权利要求1所述的柔性OLED显示面板,其中,所述第二薄膜晶体管包括:
    层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
  3. 根据权利要求1所述的柔性OLED显示面板,其中,所述第一薄膜晶体管的有源层与所述第二薄膜晶体管的有源层为不同层设置。
  4. 根据权利要求1所述的柔性OLED显示面板,其中,所述第三薄膜晶体管包括:
    层叠设置的第七绝缘层、第三栅极层、第八绝缘层、第四栅极层、第九绝缘层以及第二有机半导体层;其中,在所述第二有机半导体层上相对设置有第三源极以及第三漏极,所述第三源极以及所述第三漏极通过所述第二有机半导体层电性连接。
  5. 根据权利要求4所述的柔性OLED显示面板,其中,还包括层叠设置在所述第三源极和第三漏极上的有机平坦层、阳极、像素定义层以及间隙柱,所述有机平坦层覆盖所述第三源极和所述第三漏极。
  6. 根据权利要求1所述的柔性OLED显示面板,其中,所述第二薄膜晶体管包括:
    层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
  7. 根据权利要求6所述的柔性OLED显示面板,其中,所述第一栅极层与所述第二栅极层为不同层设置。
  8. 一种柔性OLED显示面板,其包括:
    柔性基板,所述柔性基板包括非弯折区和弯折区;
    在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
    其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管。
  9. 根据权利要求8所述的柔性OLED显示面板,其中,所述第一薄膜晶体管包括:
    多晶硅层,所述多晶硅层设置在所述柔性基板上;
    层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
    第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有第一源级,以及在所述第二过孔设置有第一漏极,所述第一源极以及第一漏极至少覆盖部分所述第二绝缘层。
  10. 根据权利要求8所述的柔性OLED显示面板,其中,所述第二薄膜晶体管包括:
    层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
  11. 根据权利要求8所述的柔性OLED显示面板,其中,所述第一薄膜晶体管的有源层与所述第二薄膜晶体管的有源层为不同层设置。
  12. 根据权利要求8所述的柔性OLED显示面板,其中,在所述非弯折区和所述弯折区上还设置有第三薄膜晶体管,且所述第三薄膜晶体管为有机薄膜晶体管。
  13. 根据权利要求12所述的柔性OLED显示面板,其中,所述第三薄膜晶体管包括:
    层叠设置的第七绝缘层、第三栅极层、第八绝缘层、第四栅极层、第九绝缘层以及第二有机半导体层;其中,在所述第二有机半导体层上相对设置有第三源极以及第三漏极,所述第三源极以及所述第三漏极通过所述第二有机半导体层电性连接。
  14. 根据权利要求13所述的柔性OLED显示面板,其中,还包括层叠设置在所述第三源极和第三漏极上的有机平坦层、阳极、像素定义层以及间隙柱,所述有机平坦层覆盖所述第三源极和所述第三漏极。
  15. 根据权利要求9所述的柔性OLED显示面板,其中,所述第二薄膜晶体管包括:
    层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
  16. 根据权利要求15所述的柔性OLED显示面板,其中,所述第一栅极层与所述第二栅极层为不同层设置。
  17. 一种显示装置,其包括柔性OLED显示面板;
    所述柔性OLED显示面板包括:
    柔性基板,所述柔性基板包括非弯折区和弯折区;
    在所述非弯折区上设置有第一薄膜晶体管,以及在所述弯折区上设置有第二薄膜晶体管;
    其中,所述第一薄膜晶体管为低温多晶硅晶体管,所述第二薄膜晶体管为有机薄膜晶体管。
  18. 根据权利要求17所述的显示装置,其中,所述第一薄膜晶体管包括:
    多晶硅层,所述多晶硅层设置在所述柔性基板上;
    层叠设置在所述多晶硅层上的第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层;
    第一过孔和第二过孔,所述第一过孔和所述第二过孔均贯穿所述第一绝缘层、第一栅极层、第二绝缘层以及第三绝缘层,且所述第一过孔和第二过孔分别设置在所述多晶硅层的一侧;其中,在所述第一过孔中设置有第一源级,以及在所述第二过孔设置有第一漏极,所述第一源极以及第一漏极至少覆盖部分所述第二绝缘层。
  19. 根据权利要求17所述的显示装置,其中,所述第二薄膜晶体管包括:
    层叠设置的第四绝缘层、第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第二多晶硅层电性连接。
  20. 根据权利要求17所述的显示装置,其中,所述第二薄膜晶体管包括:
    层叠设置的第五绝缘层、第二栅极层、第六绝缘层以及第一有机半导体层;其中,所述第六绝缘层覆盖所述第二栅极层以及所述第五绝缘层,在所述第二多晶硅层上相对设置有第二源级以及第二漏极,所述第二源级以及第二漏极通过所述第一有机半导体层电性连接。
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